Astronaut Body Mass Measurement

Ono t uozumi h honda o and nagata k 1997 mass measurement under weightless conditions by the frequency controlled method measurement 22 87 95. One measurement to check the physical condition of the astronauts is to weight them but in space you cant simply stand on the weighing scales like we do on earth. Astronauts body mass is an essential factor of health monitoring in space.

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The astronaut rides the bmmd somewhat like a pogo stick and the oscillation of a spring is used to measure mass.

Astronaut body mass measurement. Astronauts measure their mass by measuring the period of oscillation when sitting in a chair connected to a spring. Measure astronaut body mass as well as need to measure garbage items mass and scientiﬁc specimen mass. The body mass measurement device on skylab a 1970s space station had. Theirinstrumentsarebulkynoteasilydeployed in a spacecraft cabin and only moderately accurate.

Beyer n lomme j mccollough h price b and weber h 1995 proposal for an astronaut mass measurement device for the space shuttle nasa tech. Thus far nasa and the federal space agency of russia have developed only a few instruments for astronaut body mass measurement. The body mass measurement device on skylab a 1970 rm s space station had a spring constant of 606 nm. Tronaut body mass measurement10 the tensile force of a rubber cord is applied to the astronaut under test and the force is measured using a force transducer.

Thats where slammd comes in. In this method the inertial force. An astronaut uses a body mass measurement device bmmd to determine her mass. The other device is russias body mass measurement device bmmd seen being demonstrated by reid wiseman in this vine he posted last october.

The proposed space balance is based on the levitation mass method lmm that was previously proposed and de veloped by the ﬁrst author. The empty chair oscillated with a period of 0889s what is the mass of an astronaut who oscillates with a period of 215 s when sitting in the chair. What is the astronauts mass given that the force constant of the bmmd is 2600 nm and the period of oscillation is 085 s. Using slammd astronauts can accurately measure body mass with the help of newtons second law of motion fma force is equal to mass times acceleration.

The latest mass measurement device for the international space station iss has employed a linear acceleration method. See the discussion on page 427 for more details on the bmmd solution 76 gpstep 1 of 4in this problem an.